| 摘要 |
In an automatic transmission for automotive vehicles, a direct-coupling control device of a hydraulic torque converter is adapted to modulate at a constant rate a signal fluid pressure which is proportional to the vehicle speed, and supply as operating fluid pressure the modulated fluid pressure to a direct-coupling clutch of the torque converter, which locks up an input member and an output member of same. As the fluid pressure signal, a governor pressure is used which has its pressure value amplified at a constant rate and, preferably, with a pressure having a constant value added thereto.
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